ABC Family announces the summer premieres of three highly-anticipated new original series, including the riveting drama “Chasing Life” and hilarious comedies “Young & Hungry,” starring Emily Osment, and “Mystery Girls,” starring and executive produced by Tori Spelling and Jennie Garth. Fan favorites “Pretty Little Liars,” “Switched at Birth” and “The Fosters” also return in June with brand-new episodes.